Re: Mufflers-another scam item

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: Tom Jennings <tomj@xxxxxxx>
" 
" 
" 
" I was thinking also... if you were to put an electronic tone into
" the collector end, and a microphone on each port tube, on an
" oscilloscope, then swept the frequency through the equiv. RPM
" range, you could measure tube length (for equal length and bends
" that affect virtual length) I bet you could find the optimum
" scavenge RPM within a few percent.
" 
" When the tubes are all series-resonant the load on the transducer
" on the collector end would go up. You could actually measure
" header performance.
" 
" The shape of the pulses won't matter.

interesting idea!  however, pipes that are open at the far end have
quite different resonance characteristics than pipes that are closed,
and i'm not sure which the port capped with a half-open valve most
resembles.

i think the general approach is workable though.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen

adh@xxxxxxxxxxxxxxxxx                       and think what none thought